Table 2.
Mean (SD) by treatment group and first-order correlations of outcome measures.
| AR |
HLOC |
All |
M difference (95% CI) | Spearman's ρ |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
n |
6692 |
6953 |
13,645 |
6692 |
13,645 |
||||||
| M (SD) | M (SD) | M (SD) | AR | INT | ICK | PB | HI | HC | HO | ||
| AR | 6.19 (1.01) | – | – | ||||||||
| Intention (INT) | 6.62 (0.71) | 6.68 (0.72) | 6.65 (0.72) | 0.06 (0.04, 0.09) | 0.62 | ||||||
| ICK | 3.08 (1.47) | 3.06 (1.51) | 3.07 (1.49) | −0.02 (−0.07, 0.03) | −0.21 | −0.24 | |||||
| Perceived benefit (PB) | 6.47 (0.69) | 6.53 (0.69) | 6.50 (0.69) | 0.06 (0.04, 0.08) | 0.57 | 0.54 | −0.21 | ||||
| HLOC Internal (HI) | 4.91 (0.87) | 4.94 (0.86) | 4.93 (0.87) | 0.04 (0.01, 0.06) | 0.19 | 0.14 | −0.08 | 0.25 | |||
| HLOC Chance (HC) | 3.43 (1.07) | 3.41 (1.09) | 3.42 (1.08) | −0.02 (−0.06, 0.02) | −0.03 | −0.08 | 0.17 | −0.06 | −0.04 | ||
| HLOC Others (HO) | 3.91 (1.14) | 3.88 (1.17) | 3.89 (1.15) | −0.02 (−0.06, 0.02) | 0.14 | 0.01 | 0.02 | 0.16 | 0.24 | 0.34 | |
| aFOBT uptake | – | – | – | – | 0.30 | 0.37 | −0.28 | 0.21 | 0.00 | −0.07 | −0.02 |
a
Rank biserial correlation coefficient: 0.20 is considered the smallest effect for ‘practical significance’, 0.50 a moderate effect and 0.80 a large effect, according to recent studies (Ferguson, 2009); AR = anticipated regret; ICK = perceived disgust; HLOC = Health Locus of Control; FOBT = faecal occult blood test.